EXPOSURE: Head in the Clouds

ERIN WHITTAKER / HANDOUT VIA REUTERS

A rare total cloud inversion is pictured at Mather Point on the South Rim of the Grand Canyon National Park in Grand Canyon, Arizona in this November 29, 2013 picture provided by the National Park Service. Cloud inversions are formed through the interaction of warm and cold air masses.

A rare total cloud inversion is pictured at Mather Point on the South Rim of the Grand Canyon National Park in Grand Canyon, Arizona in this November 29, 2013 picture provided by the National Park Service. Cloud inversions are formed through the interaction of warm and cold air masses. (ERIN WHITTAKER / HANDOUT VIA REUTERS)

A rare total cloud inversion is pictured from the Yavapai Geology Museum on the South Rim of the Grand Canyon National Park in Grand Canyon, Arizona in this December 1, 2013 picture provided by the National Park Service. Cloud inversions are formed through the interaction of warm and cold air masses.

A rare total cloud inversion is pictured from the Yavapai Geology Museum on the South Rim of the Grand Canyon National Park in Grand Canyon, Arizona in this December 1, 2013 picture provided by the National Park Service. Cloud inversions are formed through the interaction of warm and cold air masses. (ERIN WHITTAKER / HANDOUT VIA REUTERS)